Power take-off for tractors



Get. 11 192 7 J. H. WILSON POWER TAKE-OFF FOR TRACTORS 2 Sheets-Sheet lgwuawtoar,

Filed Feb. 9. 1925 0st. 1 R92 l 7 J. H. WILSON POWER TAKE-OFF FORTRACTORS 2 Sheets-Sheet 2 Filed Feb, 1925 61cm 14 a a l Patented et. ll,1927..

JOHN HART WILSON, OF BURKBU RNETT, TEXAS.

' rowan TAKE-OFF hon TRACTORS.

Application filed February 9, 1925. Serial No. 8,016.

This invention relates to tractors, and more particularly to a powertake-off for tractors by means of which the prime mover of the tractormay be utilized to drive auxiliary apparatus, such as a winch, pump,sawmill or the like. I v I The invention is illustrated in connectionwith a Fordson tractor of well-known type and winch such as is describedin applicant? is to be understood, however, that the invention is notthus limited in its scope, but may be applied to any type of tractor andused to drive any sort of auxiliary apparatus.

It is an object of this invention to provide a power take-off by meansof which the prime mover of the tractor may be used to drive either thetractor or the Wll'lOl'L or both.

It is a further object of this invention to rovide a power take-off fora tractor which is connected directly to the main drive or propellershaft of the tractor.

Other objects and advantages of my invention will be apparent from thefollowing description, taken in conjunction with the accompanyingdrawings, which form a part of this specification, and in which: t

Figure 1 is a side elevation of a Fordson tractor showin winch applied tereto, theright rear wheel of the tractor being removed to more clearlyshow the invention;

Figure 2 is a sectional view taken on the line 2-2 of Figure 1 andshowingthe power take-off shaft;

Figure 3 is a longitudinal central section through the differential ofthe tractor showing the worm and worm drive shaft and. the manner ofconnecting my power take-d thereto; 1

Figure 4 is a detail section on the line 4-4: of Figure 1; and

Figure 5 is a sectional view of' a reverse gear which may be utilized inconnection with my invention.

Referring more particularly to the drawings, in which like referencecharacters denote like parts throughout the several views thereof,denotes generally a well-known F ordson tractor having an auxiliaryframe 11 secured thereto on which is mounted a winch 12 and a winchdriving sprocket 13.

The adaptation of my invention to a Fordson tractor may be readily madeby removing thc worm drive shaft or propeller shaft regularly suppliedwith thetractor,

Patent #1,499,045, June 24, 1924. It-

my power take-0E and and substituting a longer worm drive, shaft 14having the portion extending rearwardly from the worm 15 increased inlength. The I on the projecting end of the propeller shaft 14 and isheld in place by a suitable lock nut and washers. 1

As shown in Figure 2, a second bevel gear '19, secured to. a shaftconnected to the driving member of a clutch 21, meshes with the gear 18.A suitable housing 22 encloses the bevel gears 18 and 19, and may bebolted to the rear of the difierential housing 17 at the sameplaceusually occupied by the draw bar cap 23, which according to my inventionmay be bolted to the rear wall of housing 22, as shown in Figure 3.

The driven member of the clutch 21 is secured to the power take-offshaft 24 which is arranged in axial alignment with the shaft 20. Asprocket 25 is provided on the end of the power take-off shaft 24. TheSprocket 25 may be connected by a suitable rive to the auxiliary aparatus. As shown in Figure 1, a jack sha 26 is mounted on the side ofthe tractor, preferably in the place rovided on a Fordson tractor forthe usual elt pulley attachment. A chain 27 connects the sprocket 25with a sprocket on the jack shaft 26 and a second chain 28 connectsanother sprocket fast on the same jack shaft 26 to the winch drivingsprocket 13, which is secured to a suitable countershaft, as describedin my patent above referred to. The winch itself forms no part of mypresent invention, and description of the same is therefore omitted. Itis of course evident that a single drive chain might be utilized and thejack shaft 26 eliminated, in which case an idler sprocket would beemployed to keep the drive chain clear of the rear axle housing. Beltsmight be substituted for the chains if desired. I

A conical housing 29 is bolted to a circu lar flangeon the side of thecasin 22, and serves to protect the clutch 21 and t e shafts 20 and 24,as well as providing a support for the shafts.

The clutch mechanism may be of an suit-i able or desired type. In theembo iment disclosed, the clutch 21 comprises a sleeve 30 splinedinternally and externally and pressed onto the splined shaft 20. Asplined sliding clutch member 31, operated by a yoke on the clutch lever32, is rovided with external teeth adapted to mes with internal teeth onthe driven member 33 of the clutch. Aball bearing 34 carried by thecasing 29 supports the inner end of shaft 20, and the outer end of theshaft is carried in a bearing 35 held within the cup-shaped drivenmember 33. The power take-off shaft 24 is mounted at each end inbearings '36 supported by the housing 29. The sprocket 25 is preferablybolted to a splined hub 37 fastened. upon the splined outer end of shaft24 and the whole assembly secured in A felt washer 39 an a retainingwasher 40 are also provided at the outer end of housing 29.

In Figure 4 is shown the mechanism for disconnecting the propeller shaftfrom one of the rear wheels when it is desired to operate only the winchor other auxiliary mechanism. The worm 15 on the propeller shaft 14meshes with the worm wheel 41, which in turn operates, through the usualdifferential gearing, the differential gear 42.

i The shaft 43 of this differential gear is connected to the drivingmember of a clutch the driven member of the clutch being connected tothe axle shaft 45. The clutch 44 is mounted within the axle housing '46and is operated by lever 47 connected to a sliding member 48 mounted onthe splined sleeve 49 secured-t0 shaft 45. Sliding member 48 is providedwith external teeth meshing with lnternal teeth on the driven member 50of the clutch, which is secured to shaft 43. Suitable bearings arerovided for the support of the shafts 43 an and the general constructionof the clutch'may be substantially similar to that of the clutch 21.

When the tractor is moving and it is not desired to operate theauxiliary apparatus,

the clutch 21 will be disconnected by means of the lever 32. The gear 19meshin with the gear 18 on the propeller shaft wifi then run idly. If itis desired to operate the winch while the tractor is moving, the clutch21 will be engaged, causing the sprocket wheel 25 to revolve and drivethe winch.

To operate the power take-01f mechanism without-operatingl the tractoritself, it is only necessary to ave the clutch 21 engaged an clutch 44is disengaged, the differential gear 42 and shaft 43 will turn idlfy asthe, worm wheel 41 is revolved by the worm 15. A

corres ondin differential gear on the other side 0 the d fferential (notshown) w ll, of course, still remain connected to its driving wheel, butsince there is a load on this shaft and none on the shaft 43, the formerwill remain motionless and the shaft 43 revolve, in accordance with thewell-known principles of differential construction.

on a shaft 54.

lace by a lock nut 38..

the clutch 44- disengaged. Then the memes Figure 5 illustrates a reversegear which maybe used in connection with my power take-ofi device. Forthis purpose the outer end of the power take-off shaft 24 is providedwith a bevel gear 51'meshing with two bevel gears 52 and 53 on oppositesides of the bevel gear By means of a double clutch mechanism 55, thedetails of which will not be described as this clutch is substantiallysimilar to'clutches 21 and 44, either the gear 52 or the gear 53 may beconnected to the shaft 54. By this means the shaft 54 ma be rotated ineither direction as desire The shaft 54 is mounted in suitable hangers56 bolted to the outer end of casing 29. Where this reversing mechanismis employed, the sprocket 25 and its corresponding chains may beeliminated, and the shaft 54 run up the side of tlietractor and directlyconnected by suitable gearing to the auxiliary apparatus. lln such casethe shaft 54 would, of course, be supported at points intermediate itsends in suitable hangers secured to the frame 11.

When the sprocket 25 is utilized the regular three speeds forward andone reverse of the Fordson tractor transmission may be obtained at thepower take-off shaft. The use of the reversing ear shown in Fi ure 5permits three spee s forward and t ree reverse to be obtained. While thepower take-off mechanism described is primarily intended for use with mywinch above referred .to, it may obviously be used'with equal .suc-

such modifications are within theintent of the appended claims.

Havin is claime as new and desired to be secured by United StatesLetters Patent is: v 1. In combination with a tractor, a trans versehorizontal power take-off shaft mounted in rear of and below thedifferential thereof ,a sprocket on the end of said power take-off shaftadapted to receive a chain for driving mechanism mounted on the frontend of the frame of said tractor, a bevel ear housing bolted to thecasing of said differential,- and having a lateral extension providingbearings for said power take-off shaft, the Worm drive shaft of saidtractor extending rearwardly of said differ? ential casing andprojecting into said bevel gear housing, a bevel gear on the end of saidworm drive shaft within said housing, a bevel gear meshing therewith, aclutch havin its driving member connected to said riven beveligear andits driven member connected to said power take-off shaft, said'bevelgear casing being provided with a slot, and an operating lever extendingup- 51 and both mounted loosely thus described the invention, what i areweirdly from said clutch through said slot in reach of the operator ofseioi tractor when mounted on the driver s seat.

2. The structure set forth in claim 1 in combination with a ciuichmounted within entiel and its driven member connected to whereby eitherthe tractor or to oower m take-oil? shaft or both may be eiecihweiy op-In testimony whereof I hereunto afiix my signoture.

JHN HART WESUN,

